9691242181776 has 135 divisors (see below), whose sum is σ = 27595780763161. Its totient is φ = 3174939046272.

The previous prime is 9691242181759. The next prime is 9691242181787. The reversal of 9691242181776 is 6771812421969.

The square root of 9691242181776 is 3113076.

It is a perfect power (a square), and thus also a powerful number.

9691242181776 is a `hidden beast` number, since 9 + 69 + 1 + 2 + 421 + 81 + 7 + 76 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4647732339600 + 5043509842176 = 2155860^2 + 2245776^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2204055610 + ... + 2204060006.

Almost surely, 2^{9691242181776} is an apocalyptic number.

9691242181776 is the 3113076-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9691242181776

9691242181776 is an abundant number, since it is smaller than the sum of its proper divisors (17904538581385).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9691242181776 is an frugal number, since it uses more digits than its factorization.

9691242181776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8926 (or 4461 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The spelling of 9691242181776 in words is "nine trillion, six hundred ninety-one billion, two hundred forty-two million, one hundred eighty-one thousand, seven hundred seventy-six".